Wnte a C program that reads three color bands specified below from the file named "resistorcolor.txf" and write the corresponding resistor value to a file called 'resistorvalue.txt". Your program should 1) Use the following user-defined function (see next page) int col to_num (char color, int choice) to help convert the color to number that you can use to find the resistor value. The function is NOT complete-complete it before you use it. 2) Since we have not talked about string, we will use one letter and a number to associate the correct color in resistorcolors.txt" as follows Black Brown Blue B 3 Green Gray Gold G 3